Study - African American People

Since I considered african american character as one of my (many) weaknesses, I did small study on it. The purpose of this study is trying to "get to know" the type of their face, don't try to hard to you recognize some of them because I didn't try to nail the likeness of the faces. The studies were referenced from images I could find, plus on the bottom I tried to draw african american man and woman on several positions from my imagination just to check if I learned something.